For stupid calls, the answer is 'NO!' Publicize those calls and the people who make them. Most people don't want to be a laughingstock. Preventative medicine?

Training won't happen. That takes personal responsibility.

Force them to take a small bag of gear, and when push comes to shove, they can make a fire, put a tarp over their heads, and scoop water from the river, simply because they HAVE to.